Honeywell RTH8580WF User Manual page 55

System setup
How do I change time and date settings? (See page 51 for instructions.)
Function
0120
Year Setting
(first two digits)
0130
Year Setting
(last two digits)
0140
Month Setting
0150
Date Setting
0160
Schedule Options
0165
Restore Schedule
Defaults
Settings & Options
20 = Year 20xx
21 = Year 21xx
01–99 (i.e., 2001–2099)
01–12 (i.e., January–December)
01–31
4 Program schedule is on (7-day programmable).
0 Program schedule is off. Thermostat can not be programmed.
0 Continue using programmed schedule.
1 Restore thermostat program to energy saving settings
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